From help-request at octave dot org Fri Feb  4 08:30:37 2005
Subject: octave-speed
From: =?ISO-8859-1?Q?Rafael_Rodr=EDguez_Velilla?= <rrv66 at tid dot es>
To: help at octave dot org
Date: Fri, 04 Feb 2005 15:34:51 +0100

Hello all,

   I'm new to octave and I'm planning to use it to simulate DSP algorithms.

   Speed is a matter of concern in my simulations. I have made a stupid 
test to compare octave's performance with Matlab's performance:

m=1:100000;
n=8;
for i=1:99999
   n=sqrt(sqrt(m(i)*m(i+1))*n);
endfor
n

In the same computer it takes 10 seconds to run under linux-octave but 
less than a second under Matlab.

I have compiled octave 2.1.64 with shared libraries with gcc3.2...
... is there a way to improve its performance?
For example by compiling it with CPPFLAGS=-march=i686???

I have read that maybe using ATLAS improves the performance.

Any hints on how to compile it to run faster?



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